An admitted gang member was convicted Thursday of murdering two people and trying to kill 10 others during a shooting spree in the San Fernando Valley in the summer of 2006.

The Los Angeles Superior Court jury deliberated a day before finding Marlon Osorio guilty of first-degree murder for the shooting deaths of Nelson Ramirez and Jesus Garcia, according to Deputy District Attorney Paul Nunez.

Jurors also found true the special circumstance allegations of multiple murders and gang-related murder.

The jury is due back in court Monday for the start of the trial’s penalty phase, during which they will be asked to recommend whether the 26-year- old defendant should be sentenced to death or life in prison without the possibility of parole.

Ramirez was shot five times while he sat in his car in the 1400 block of Vanowen Street in Van Nuys on Aug. 7, 2006, authorities said.

Within an hour of that shooting, he had killed Garcia in Canoga Park and tried to kill four other people, authorities said.

Osorio also fired on another group of people on Aug. 14, 2006, in the 15000 block of Nordhoff Street in North Hills. One woman was shot in the back and suffered a collapsed lung, according to the prosecution.

Along with the murders, Osorio was convicted of 10 counts of attempted murder. He was acquitted of an 11th attempted murder charge.